Radiographic image capturing method and apparatus, and radiographic image generating method and apparatus
AssigneeFUJIFILM Corporation
InventorHiroki Nakayama
Life of this patent
Estimating the term…
Abstract
The grid is disposed between a subject to be imaged and a solid-state detector while a radiation source and radiation-impermeable members of a grid are in such a positional relationship that the orbital plane of the radiation source which is angularly movable and the direction in which the radiation-impermeable members extend are perpendicular to each other. The radiation source is moved to an angular position through an turning angle which is up to 5° excluding 0°, from a line normal to the solid-state detector. The radiation source moved to the angular position applies a radiation obliquely to the subject.
Claims8
A radiographic image capturing method using a grid for removing scattered rays of a radiation applied to a radiation detector, the grid including an assembly formed by alternately arranging radiation-permeable members and radiation-impermeable members which extend in one direction, the radiographic image capturing method comprising the steps of:
- placing the grid between a subject to be imaged and the radiation detector in such a positional relationship that an orbital plane of the radiation source which is angularly movable and the one direction are perpendicular to each other;
- moving the radiation source to an angular position through an angle which is up to 5° excluding 0°, from a line normal to the radiation detector;
- and
- applying the radiation from the radiation source which has been moved to the angular position, obliquely to the subject.
A radiographic image capturing apparatus comprising:
- a radiation source for emitting a radiation;
- a drive controller for actuating the radiation source to turn along an orbit;
- a grid for removing scattered rays of the radiation, the grid including an assembly formed by alternately arranging radiation-permeable members and radiation-impermeable members which extend in one direction;
- and
- a radiation detector for detecting the radiation emitted from the radiation source;
- wherein the grid is disposed between a subject to be imaged and the radiation detector in such a positional relationship that an orbital plane of the radiation source and the one direction are perpendicular to each other;
- the drive controller moves the radiation source to an angular position through an angle which is up to 5° excluding 0°, from a line normal to the radiation detector;
- and
- the radiation detector detects the radiation which is emitted from the radiation source at the angular position, obliquely to the subject.
A radiographic image generating method using a grid for removing scattered rays of a radiation applied to a radiation detector, the grid including an assembly formed by alternately arranging radiation-permeable members and radiation-impermeable members which extend in one direction, the radiographic image generating method comprising the steps of:
- placing the grid between a subject to be imaged and the radiation detector in such a positional relationship that an orbital plane of the radiation source which is angularly movable and the one direction are perpendicular to each other;
- determining at least two angles in a range from −5° through 5° with respect to a line normal to the radiation detector, as turning angles through which the radiation source is to be turned along an orbit;
- and
- moving the radiation source to respective angular positions depending on the determined turning angles, applying the radiation from the radiation source at the angular positions, to the subject, and acquiring radiographic images of the subject depending on the respective turning angles.
A radiographic image generating apparatus comprising:
- a radiation source for emitting a radiation;
- a drive controller for actuating the radiation source to turn along an orbit;
- a grid for removing scattered rays of the radiation, the grid including an assembly formed by alternately arranging radiation-permeable members and radiation-impermeable members which extend in one direction;
- and
- a radiation detector for detecting the radiation emitted from the radiation source;
- wherein the grid is disposed between a subject to be imaged and the radiation detector in such a positional relationship that an orbital plane of the radiation source and the one direction are perpendicular to each other;
- the drive controller moves the radiation source to respective angular positions through at least two turning angles in a range from −5° through 5° from a line normal to the radiation detector;
- and
- the radiation detector detects the radiation which is emitted from the radiation source at each of the angular positions to the subject.
Dependencies are inferred from the claim text.